Dear Guojun Zhu,
Try this...
Plot[{Sin[x], Cos[x]}, {x, -2\[Pi], 2\[Pi]},
PlotStyle -> {RGBColor[1, 0, 0], RGBColor[0, 1, 0]}]
Thank you,
Anesh
Guojun Zhu wrote:
> I can plot two functions in one diagram with plot[{fa[x],fb[x]},{x,1,100}],
> but they are in same color and hard to seperated. Is there any way to make
> them in different colors?
>
> --
> Sincerely Yours
> Guojun Zhu